I had a $250 Macy's Gift card that i wanted to sell and get some money for, so I saw that cardpool had the highest rating out of all the sites to sell gift cards on. They offered me $207.50 for it, which I was willing to take.
I printed out the prepaid label, shipped out the card, and then waited. And waited. And waited some more.
After a week in a half of hearing nothing at all, I was worrying that my card was lost. I emailed them and they said that it was due to "Heavy traffic" that they hadn't gotten to my gift card yet in terms of processing it.
And yet, I waited almost another 2 weeks... and then FINALLY, I got a confirmation that they were sending out my check. I got the check and cashed it with no issues.
So in the end, I didn't get ripped off, but I was definitely worried a good majority of the time while this whole thing took place. So in my opinion, Cardpool isn't bad (for me anyway), but after waiting as long as I did, I'm not sure I want to do business with them anymore.